Wall-board.



A. G. CAMERON & C- D. HIGGINS.

WALL BOARD.

1 APPLICATION FILED DEC. 1. I914.'

1,183,1 65. Patented May16,1916.

INV- TO WITNESS RS 1 H. 6! CHI/PIERUIY 5. Gail/256i: gmm mw 46; A TTORNEYS.

UNITED STATES PATENT OFFICE.

ALFRED G. CAMERON, OF OAKLAND, AND CHARLES D. HIGGINS, F BERKELEY,

CALIFORNIA.

WALL-BOARD.

Specification of Letters Patent.

Patented May 16, 1916.

To all whom-it may concern:

Be it known that we, ALFRED G. CAMERON, a sub ect of Great Britain, anda resident of Oakland, Alameda county, State of California, and CHARLESD. HIGGINS, a citizen of the United States, and a resident of Berkeley,Alameda county, State of California, have invented a certain new anduseful Wall-Board, of which the following is a specification.

The invention relates to a board for use in building construction bothfor interior and exterior construction and for decorative purposes. I

An object of the invention is to produce a durable and attractive board.

Another object of the invention is to provide a board possessingdecorative qualities.

The invention possesses other advantageous features, some of which, withthe foregoing, will be described at length in the followingspecification where we shall outline in full one form of board and themethod of making'it.

: We shall describe herein one or more specific forms of our genericinvention, but it is to be understood that we do not limit ourselves tosuch forms, because the invention may be embodied in amultiplicity offorms, each being a species of our said invention. It is also to beunderstood'that by the claims succeedingthe description of ourinvention, we desire to cover the invention in whatever form it may beembodied.

The: figure isa cross section on an en larged scale of the wall-boardofour invention.

The board of our invention, which we have for convenience termed a wallboard, may

be used for covering walls on the interior I i or the exterior of abuilding, may be used in the construction of certain articles offurniture, such as screens, and may be employed for decorative purposesin many locatlons 1n buildings and other structures. The board.

presents a rough surface, the texture of which lends itself well todecorative purposes and which presents a very attractive appearance. 1

The product is made up' in fiat sheets of any desirable size, which areattached to the building frame or "other frame, by any suitable means,such as nailing. The texture'of the surface of the board is such thatwhen fastened by small nails, the heads of the nails are not visible onthe board except by very close scrutiny. For this reason, the board maybe supported and secured by the nails at various points over itssurface; an advantageous feature over prior wall boards, which aresecuredv only at their edges and are, therefore, prone to bulge.

The board of our invention consists of a base or sheet of fibrousmaterial 2, of sufli c1ent thickness to make it relatively still. Therear face of the base or sheet is coated with a waterproof material 3such as asphaltum paint to protect the board from moisture. The frontsurface of the base or sheet is first coated with a suitable size orother cementitious material 4 and before the size has dried it iscovered with a finely divided mineral 5 which adheres to the size. Thisfinely divided mineral may be sand or fine gravel, a mixture of sand andgravel or may be crushed mineral of a suitable quality. By employingsand, gravel or other mineral of different colors, boards of almost anydesirable color may be produced and the colors are permanent. en a blueboard is desired a finely divided blue mineral is employed, and when ared board is desired, a finely divided red mineral is employed. -Whenthe colored minerals are not found in suitable quantities in nature inthe form of sand or gravel, larger pieces of the mineral are crushed toproduce the desired fineness of the particles. These finely dividedparticles range preferably in size from the size of a grain of sand tothe size of a small piece of gravel and it is desirable to employ amixture of particles of various sizes, in order that the entire surfaceof the board may be covered, and in order that the desired rougheffectmay be obtained.

When desirable, designs of various sorts may be produced by employingminerals of been applied and the size has set, the mineral surface ispreferably given another coat of size 6 to attach the mineral particlesmore present the appearance of the ordinary rough finished plasterwalk-surface of the boards is calcimined after the boards have beenattached to the wall timbers and the result is a wall which cannot bevisually difi'erentiated from the ordinary rough finished plaster wall.Rough finished interior walls are in great demand, but when made ofplaster they require a large quantity of beach sand, which is availablein many sections of the country only at a prohibitive cost. By the useof the board of our invention, rough finished walls may be placed in anybuilding at a low cost regardless of the distance to beach sand.Furthermore, a Wall formed of wall board of this construction-is notliable to the cracking which is common to plastered Walls and can beerected quicker and at less expense than a plastered wall. The board is,of course, applicable for use on ceilings and in light partitions, suchas screens, and in the latter case the board is provided with a mineralfinish on both sides.

We claim:

l. A wall board comprising a solid sheet of material of such thicknessas to make it relatively inflexible, a coating of cementitious materialon the front face of said sheet, and a coating of finely divided mineralattached to said cementitious material.

2. A Wall board comprising a sheet of material of such thickness as tomake it relatively inflexible so as to permanently maintain a flatcondition, a coating of cementitious material on one side of said sheet,a coating of finely divided mineral attached to said cementitiousmaterial, and a coating of cementitious material on said mineral coatmg.

8. A wall board comprising a sheet of material of such thickness as tomake it relatively inflexible, a coating of cementitious material on oneside of said sheet, a coating of finely divided mineral of one color onparts of said cementitious coating, and a coating of finely dividedmineral of another color on other parts of said cementitious coating.

' In testimony whereof, We have hereunto set our hands at Oakland,California, this 28th day of November, 1914.

ALFRED G. CAMERON.

CHARLES D. HIGGINS.

In presence of- A. E. J OHNSON,

CARLOS G. WHITE.

